1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
This file is part of GNUnet.
Copyright (C) 2014, 2017 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
*/
/**
* @file cadet/gnunet-service-cadet_hello.c
* @brief spread knowledge about how to contact other peers from PEERINFO
* @author Bartlomiej Polot
* @author Christian Grothoff
*
* TODO:
* - is most of this necessary/helpful?
* - should we not simply restrict this to OUR hello?
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_peerinfo_service.h"
#include "cadet_protocol.h"
#include "gnunet-service-cadet.h"
#include "gnunet-service-cadet_dht.h"
#include "gnunet-service-cadet_hello.h"
#include "gnunet-service-cadet_peer.h"
#define LOG(level, ...) GNUNET_log_from(level,"cadet-hll",__VA_ARGS__)
/**
* Hello message of local peer.
*/
static struct GNUNET_HELLO_Message *mine;
/**
* Handle to peerinfo service.
*/
static struct GNUNET_PEERINFO_Handle *peerinfo;
/**
* Iterator context.
*/
static struct GNUNET_PEERINFO_NotifyContext *nc;
/**
* Process each hello message received from peerinfo.
*
* @param cls Closure (unused).
* @param peer Identity of the peer.
* @param hello Hello of the peer.
* @param err_msg Error message.
*/
static void
got_hello (void *cls,
const struct GNUNET_PeerIdentity *id,
const struct GNUNET_HELLO_Message *hello,
const char *err_msg)
{
struct CadetPeer *peer;
if ( (NULL == id) ||
(NULL == hello) )
return;
if (0 == memcmp (id,
&my_full_id,
sizeof (struct GNUNET_PeerIdentity)))
{
GNUNET_free_non_null (mine);
mine = (struct GNUNET_HELLO_Message *) GNUNET_copy_message (&hello->header);
GCD_hello_update ();
return;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Hello for %s (%d bytes), expires on %s\n",
GNUNET_i2s (id),
GNUNET_HELLO_size (hello),
GNUNET_STRINGS_absolute_time_to_string (GNUNET_HELLO_get_last_expiration (hello)));
peer = GCP_get (id,
GNUNET_YES);
GCP_set_hello (peer,
hello);
}
/**
* Initialize the hello subsystem.
*
* @param c Configuration.
*/
void
GCH_init (const struct GNUNET_CONFIGURATION_Handle *c)
{
GNUNET_assert (NULL == nc);
peerinfo = GNUNET_PEERINFO_connect (c);
nc = GNUNET_PEERINFO_notify (c,
GNUNET_NO,
&got_hello,
NULL);
}
/**
* Shut down the hello subsystem.
*/
void
GCH_shutdown ()
{
if (NULL != nc)
{
GNUNET_PEERINFO_notify_cancel (nc);
nc = NULL;
}
if (NULL != peerinfo)
{
GNUNET_PEERINFO_disconnect (peerinfo);
peerinfo = NULL;
}
if (NULL != mine)
{
GNUNET_free (mine);
mine = NULL;
}
}
/**
* Get own hello message.
*
* @return Own hello message.
*/
const struct GNUNET_HELLO_Message *
GCH_get_mine (void)
{
return mine;
}
/* end of gnunet-service-cadet-new_hello.c */
|
